Multiple coil pulsed magnetic resonance method to measure the SSC bending magnet multipole moments
This Final Report presents a summary of the performance of a 32-coil pulsed nuclear magnetic resonance field mapping system for mapping SSC dipole magnets that was developed with the support of Contract DE-AC0287ER40350. It measures the magnetic multipole moment coefficients up to a[sub 15] and b[sub 15] in a warm bore tube along the 98% of the length of the magnet that has a field homogeneous enough for NMR measurements. The 1 cm long active region of the probe permits it to measure the 8.5 cm periodicity of the coefficients attributed to the twist pitch of the superconducting cable. The system's measurement rate of four measurements per second allows it to probe the dynamic behavior of the coefficients down to a time scale of .25 seconds in swept field and other transient field situations. An analysis of the errors in the measurements and a comparison with measurements by the Brookhaven Mole on SSC dipole DCA317 is discussed along with an extended set of measurements on this magnet near the injection field of 0.67 T and 2.2 T.
- Research Organization:
- California Univ., Los Angeles, CA (United States). Dept. of Physics
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-87ER40350
- OSTI ID:
- 6990290
- Report Number(s):
- DOE/ER/40350-7; ON: DE93006465
- Country of Publication:
- United States
- Language:
- English
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